UT II级基础理论试题.docx
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UTII级基础理论试题
UTII级基础理论试题
UTLevelIIGeneralExamination
姓名：
_______________得分：
______________主考官：
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NameScoreExaminer
1.以下哪项可视为超声技术的应用：
Whichofthefollowingwouldbeconsideredapplication（s）ofultrasonictechniques:
A.测材料的弹性模量
Determinationofamaterial'selasticmodulus
B.研究材料的冶金结构
Studyofamaterial'smetallurgicalstructure
C.材料厚度测量
Measurementofamaterial'sthickness
D.以上都是
Alloftheabove
2.可在液体中传播的波型是：
Theonlysignificantsoundwavemodethatwilltravelthroughaliquidis:
A.剪切波Shear
B.纵波Longitudinal
C.表面波Surface
D,瑞利波Rayleigh
3.材料的声阻抗用于：
Theacousticimpedanceofamaterialisusedto:
A.确定在界面上的折射角
Determinetheangleofrefractionataninterface
B.确定材料内部的衰减
Determinetheattenuationwithinthematerial
C.确定界面上反射和穿越声波的相对能量值
Determinetherelativeamountsofsoundenergycoupledthroughandreflectedataninterface
D.确定材料内的声束传播
Determinethebeamspreadwithinthematerial
4.斜探头耦合到试件上，增大入射角直至第二临界角，则：
Whenanglebeamcontacttestingatestpiece.Increasingtheincidentangleuntilthesecondcriticalangleisreachedresultsin:
A.表面波全反射
Totalreflectionofasurfacewave
B.横波产生45°折射
45°refractionoftheshearwave
C.产生表面波
Productionofasurfacewave
D.以上全是
Alloftheabove
5.以下各类声波中，哪种具有多种或变化的波速：
Ofthefollowingsoundwavemodes,whichonehasmultipleorvaryingwavevelocities:
A.纵波Longitudinalwave
B.横波Shearwave
C.剪切波Transversewave
D.兰姆波Lambwave
6.晶片厚度与幅射频率的关系是，晶片越薄：
Thecrystalthicknessandtransducerfrequencyarerelated,Thethinnerthecrystal:
A.频率越低Thelowerthefrequency
B.频率越高Thehigherthefrequency
C.无明显效果Thereisnoappreciableaffect
D.以上全不对Noneoftheabove
7.与换能器相邻的声压振荡区域，其长度受哪些影响：
Thelengthofthezoneadjacenttoatransducerinwhichfluctuationsinsoundpressureoccurismostlyaffectedby:
A.换能器的频率
Thefrequencyofthetransducer
B.换能器的直径
Thediameterofthetransducer
C.换能器电缆长度
Thelengthoftransducercable
D.A和B
AandB
8.频率增加时，给定晶片的声束扩散角度会：
Asfrequencyincreasesinultrasonicteasting,theangleofbeamdivergenceofagivendiametercrystal:
A.减小Decreases
B.保持不变Remainuncharged
C.增加Increases
D.按每种波长均匀变化Variesuniformlythrougheachwavelength
9.在液浸中，近场可用以下哪种方法消除：
Inimmersiontesting,thenearfieldeffectsofatransducermaybeeliminatedby
A.增加换能器的频率
Increasingtransducerfrequency
B.用大尺寸晶片
Useofalargerdiametertransducer
C.采用适当的水层厚度
Usinganappropriatewaterpath
D.采用聚焦探头
Useofafocusedtransducer
10.纵波沿着与法线成5°角的方向由水中入射到钢中，则折射横波：
Alongitudinalultrasonicwaveistransmittedfromwaterintosteelatanangleof5°fromthenormal,insuchcases,therefractedangleofthetransversewaveis:
A.小于纵波折射角
Lessthantherefractedangleofthelongitudinalwave
B.等于纵波折射角
Equaltotherefraeteadangleofthelongitudinalwave
C.大于纵波折射角
Greaterthanthelongitudinalwave
D.根本没有
Notpresentatall
11.声束在哪里产生扩散
Wheredoesbeamdivergenceoccur
A.近场Nearfield
B.远场Farfield
C.晶片处Atthecrystal
D.以上全不对Noneoftheabove
12.用垂直于其表面的声波检测薄层时，应观察：
Thinsheetmaybeinspectedwiththeultrasonicwavedirectednormaltothesurfacebyobserving;
A.前界面反射波幅
Theamplitudeofthefrontsurfacereflection
B.多重反射波形
Themultiplereflectionpattern
C.所有的前界面反射
Allfrontsurfacereflections
D.以上全不是
Noneoftheabove
13.瑞利波对位于哪里的缺陷最敏感：
Rayleighwavesareinfluencedmostbydefectslocated:
A.表面下一个波长内
Onewavelengthbelowthesurface
B.表面下六个波长内
Sixwavelengthbelowthesurface
C.表面或近表面
Closetooronthesurface
D.表面下三个波长内
therewavelengthbelowthesurface
14.兰姆波可用来检查：
Lambwavescanbeusedtodetect:
A.薄工件中近表面分层
Laminur-typedetectsnearthesurfaceofathinmaterial
B.厚焊件中心部位的未熔合
Lackoffusioninthecenterofathickweldment
C.熔合面上的空隙
Internalvoidsindiffusionbonds
D.重板材的厚度变化
Thicknesschangesinheavyplatematerial
15.哪种定律可计算纵波和横波的折射角：
Whatlawcanbeusedtocalculatetheangleofrefractionwithinametalforbothlongitudinalandshearwaves:
A.泊松比定律Poisson'sRatioLaw
B.斯涅尔定律Snell'sLaw
C.弗朗活费定律Fresnel'sFieldLaw
D.查理定律Charles'Law
16.直探头检测上下表面不平行的工件时会引起：
Duringstraightbeamtesting,testspecimenswithnon-parallelfrontandbacksurfacescancause:
A.底波部分或全损失
Partialortotallossofbackreflection
B.底波无损失
Nolossinbackreflection
C.底波显示信号变宽
Awidened（broad）backreflectionindication
D.底波显示信号会聚
Afocused（narrow）backreflectionindication
17.在B扫描中，不连续的屏幕显示长度与哪项相关：
InaB-scandisplay,thelengthofascreenindicationfromadiscontinuityisrelatedto:
A.平行于声束方向的厚度
Adiscontinuity'sthicknessasmeasuredparalleltotheultrasonicbeam
B.探头移动方向上的长度
Thediscontinuity'slengthinthedirectionofthetransducertravel
C.A和B
AandB
D.非A和B
Noneoftheabove
18.以下哪项能产生关于缺陷面积的重迭的平面图：
Ofthefollowingscantypes,whichonecanbeusedtoproducearecordingofflawareassuperimposedoveraplanviewofthetestpiece;
A.A扫描A-scan
B.B扫描B-scan
C.C扫描C-scan
D.D扫描D-scan
19.参考试块的主要目的：
Aprimarypurposeofareferencestandardis:
A.为了校对仪器以便能发现有害缺陷
Toprovideaguideforadjustinginstrumentcontrolstorevealdiscontinuitiesthatareconsideredharmfultotheenduseoftheproduct
B.作为工具可以给操作者提供缺陷的实际大小
Togivethetechnicianatoolfordeterminingexactdiscontinuitysize
C.确保可测得的不连续小于相应的反射体
Toprovideassurancethatalldiscontinuitiessmallerthanacertainspecifiedreferencereflect
D.可提供标准反射体，它可以模拟具有临界尺寸的真实不连续性
Toprovideastandardreflectorwhichexactlysimulatesnaturaldiscontinuitiesofacriticalsize
20.以下压电材料中，声接收性能最好的是：
Ofthepiezoelectricmaterialslistedbelow,themostefficientsoundreceiveris:
A.硫酸锂Lithiumsulfate
B.石英Quartz
C.钛酸钡Bariumtitanate
D.氧化银Silveroxide
21.以下压电材料中，传声性能最好的是：
Ofthepiezoelectricmaterialslistedbelow,themostefficientsoundtransmitteris:
A.硫酸锂Lithiumsulfate
B.石英Quartz
C.钛酸钡Bariumtitanate
D.氧化银Silveroxide
22.一套标准试块，除了反射体（例如：
平底孔）的尺寸不同外具有相同的外形和尺寸，则此套试块为：
Asetofstandardreferenceblockswiththesamegeometricalconfigurationanddimensionsotherthanthesizeofthecalibrationreflectors,e.gflatbottomholesiscalledasetof;
A.距离一波幅型
Distance-amplitudestandards
B.面积一波幅型
Area-amplitudestandards
C.可变频率的试块
Variablefrequencyblocks
D.声束传播测量试块
Beamspreadmeasuringblocks
23.A-型显示UT仪器当中，控制示波器的垂直偏转板上的电压的是：
WhichofthefollowingcontrolsthevoltagesuppliedtotheverticaldeflectionplatesoftheCRTinanA-scanUTsetup:
A.扫描发生器Sweepgenerator
B.脉冲pulse
C.放大电路amplifiercircuit
D.时钟clocktimer
24.UT仪器垂直线性可以通过测以下哪项的响应回波来获得：
Theverticallinearrangeofatestinstrumentmaybedeterminedbyobtainingultrasonicresponsesfrom:
A.一套距离---幅度参考试块
Asetofdistance-amplitudereferenceblocks
B.不同水距处的小钢球
Steelballslocatedatseveraldefferentwaterpathdistances
C.一套面积---幅度参考试块
Asetofarea-amplitudereferenceblocks
D.以上全是
Alloftheabove
25.大晶粒金属材料常会引起：
Largegrainsinametallictestspecimenusuallyresultin:
A.底波的减小或损失
Decreaseorlossofbacksurfacereflection
B.大的杂波或噪声
Large"hash"ornoiseindications
C.穿透力减小
Decreaseinpenetration
D.以上全是
Alloftheabove
26.切割石英晶体以使其主面平行于Y和Z轴，垂直于X轴，此称为：
AquartzcrystalcutsothatitsmajorfacesareparalleltotheZandYaxesandperpendiculartotheXaxisiscalled:
A.Y切石英AY---cutcrystal
B.X切石英AnX---cutcrystal
C.Z切石英AZ---cutcrystal
D.ZY切石英AZY---cutcrystal
27.某种材料所具有的可以将电能转变为机械能（反之亦然）的特性叫做：
Thepropertyofcertainmaterialstotransformelectricalenergytomechanicalenergyandvice
A.模式转换modeconversion
B.压电效果piezoelectriceffect
C.折射refraction
D.阻抗匹配impedancematching
28.对于铝和铜，纵波声速约为横波声速的_____:
Foraluminumandsteelthelongitudinalvelocityisapproximately____theshearvelocity
A.相同equalto
B.二倍twice
C.一半one-halfof
D.四倍fourtimes
29.将仪器调节至标准状态的过程是指：
Theprocessofadjustinganinstrumentordevicetoareferencestandardisreferredtoas:
A.角度angulation
B.扫查scaning
C.距离---波幅变化修正
correctingfordistance-amplitudevariations
D.定标calibration
30.以下哪种情况会出现明显错误的超声测厚结果：
Significanterrorsinultrasonicthicknessmeasurementcanoccurif:
A.检测频率连续变化
Thetestfrequencyisvaryingataconstantrate
B.传播声速的假设值与实际值有偏差
Thevelocityofpropagationdeviatessubstantiallyfromanassumedconstantvalueforagiven
C.用水做耦合剂
Waterisemployedasacouplantbetweenthetransducerandthepartbeingmeasured
D.以上全不会出错
Noneoftheaboveshouldcauseerrors
31.板材的斜探头扫查常常会漏掉：
Anglebeamtestingofplatewilloftenmiss:
A.垂直于声束的裂纹
Cracksthatareperpendiculartothesoundwave
B.随机分布的夹层
Inclusionsthatarerandomlyoriented
C.平行于上表面的分层
Laminationsthatareparalleltothefrontsurface
D.一串小缺陷
Aseriesofsmalldiscontinuities
32.在UT中，脉冲的延续时间是指：
Inultrasonictesting,thetimedurationofthetransmittedpulseisreferredtoas:
A.脉冲长度或宽度
Thepulselengthorpulsewidth
B.脉冲幅度
Thepulseamplitude
C.脉冲形状
Thepulseshape
D.以上全不对
Noneoftheabove
33.声束入射到界面上，在同一界质中改变传播方向的现象称为：
Thephenomenonbywhichawavestrikesaboundaryandchangesthefirst
mediumiscalled:
A.扩散divergence
B.阻抗impedance
C.角度angulation
D.反射reflection
34.声束从一种介质进入另一声速不同的介质时，方向改变的现象称为：
Thechangeindirectionofanultrasonicbeamwhenitpassesfromonemediumtoanotherwhosevelocitydiffersfromthatofthefirstmediumiscalled:
A.折射refraction
B.膨胀rarefaction
C.角度angulation
D.反射reflection
35.用于激励压电晶片的脉冲，其宽度增加会引起：
Increasingthelengthofthepulseusedtoactivatethesearchunitwill:
A.声
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